[HUDI-8315] update SqlKeyGenerator#convertPartitionPathToSqlType to handle default_partition_path

[karthick-de-25]

Change Logs

the issue is at SqlKeyGenerator#convertPartitionPathToSqlType
where the default HIVE_DEFAULT_PARTITION value is trying to be converted into Long/milli second.

update SqlKeyGenerator#convertPartitionPathToSqlType to handle default_partition_path

TODO:

• add testcase for ts default_partition_path at TestSparkSqlWithTimestampKeyGenerator

Impact

partition_path for timestamp partition

Risk level (write none, low medium or high below)

low

Documentation Update

NA

Contributor's checklist

• Read through contributor's guide
• Change Logs and Impact were stated clearly
• Adequate tests were added if applicable
• CI passed

[hudi-bot]

CI report:

• e85120a Azure: SUCCESS

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